I have the stock Nautos 5:1 system on a 2007 Getaway and I keep have problems cleating with the main in 15 knots+. The main sometimes comes uncleated on its own. I have read the other posts and tried different cleat angle adjustments. When the traveler is out a good bit, the cleat angle is never going to be ideal for cleating however it should stay. I even stand up to get a good cleat angle and it still come loose sometimes. Should I get the Harken 57mm system? Go to 6:1? What is the best line to get? Will new system really make a difference? I will spend the money but I just want to make sure it will really help.

I have an 02 purchased in 03. I upgraded to Harken after a month and it still works flawlessly 10 years later. It does solve the problem. I am still using the original main sheet. You don't need a 6:1 system unless you can't handle the pull on the current 5:1.

It is weird that the cleat would become uncleated with a lot of wind if it was properly cleated. With that wind, the mainsail should be pulling hard and I'd say it could be difficult to uncleat. Sometimes it may happen (it has happened to me) that you step on the sheet and that makes it uncleat. Personally I would almost never cleat the mainsail above 15 knots so that I can quickly release it if something happens (like a big gust)

Thanks! The Harken 57 mm Triple Carbo Ratchamatic base is outstanding. Cleating and uncleating is much better. The Ratchamatic system is great is heavy air also, It reduces the tension on the main by a factor of ten and thus is much safer. The Robline was expensive but it is and very light. Both are well worth the money.